Open-hearth furnace



W. H. SOMMER.

OPEN HEARTH FURNACE.

APPLICATION msn MAB- 5. 1919.

1 ,407,004:, Patented Feb. 21, 1922.

2 SHEETS-SHEET I.

IN'SZ'ENTDR.

A'rpr W. H. SUMMER.

OPEN HEARTH FURNACE.

APPLICATION HLED'MAR- 5. 1 919.

Patented F01)- 21, 1922.

s-snan 2.

IIIIIIIIIIIIIIIIIIII INYENTUR'- TATES WILLIAM H. scrim, F PEOBIA,

TO THE UNION TRUST COMPANY,

AND IE A. OHAPMAN, OF CHICAGO, ILLINOIS, TRUSTEES.

OYEN-HEAR'I'Bi FURNACE.

Specification of Letters Patent.

Patented Feb. 21, 1922.

Application filed March 5, 1919. Serial R0. 280,788.

To all whom it concern:

Be it known that WILLIAM H. SOMMER,

a citizen of the United States, residin at Peoria, in the county of Peoria and tate of Illinois, have invented new and useful Improvements in Open-Hearth Furnaces, of which the following is a specification.

This invention has reference to 0 enhearth furnaces, and it relates particu arly to a protectin wall for the back wall of the furnace. aid protecting wall comprising a fixed art which is coincident with the buck-stays, and a movable part situated between each set of buck-stays.

It is common knowledge, in open-hearth practice, that it is necessary to replace backwalls because of deterioration, and at times, on account of the back-wall falling in. If a back-wall gives way during a heat, the heat will freeze, entailing considerable loss,

and therefore, it is the practice that if the operator sees that the back-wall will give before a heat can be consummated, he will shut the furnace down until a new backwall is built.

My invention is intended, first, to protect that portion of the back-wall coincident with each set of buck-stays, by a wall built up in front of each set of buck-stays and being bound thereto; and second, to protect that portion of the furnace, coincident with the back-wall between each set of buck-stays, by a movable shield or wall which is used to cover the deteriorated, or fallen wall. Said movable shield or wall serves also, to rotect the working men during the rebuil ing of the wall, in case it is desirable to reconstruct the back-wall, between the sets of buck-Sta 5 during a heat.

That t e invention may be more fully understood reference is bad to the accompanying drawings, in which Figure 1 is a rear elevation of a part of an open-hearth furnace, with my invention ap lied thereto;

igure 2 is a cross-section through a furnace, showing my invention applied to the rear wall;

Fi re 3'is a detail. cross-section, in Ian showing the wall construction coinci cut .with a set of buck-stays, and part of two movable wall sections, one on either side of the set of buck-sta s; l

Figure" 4 is a detail, in elevation,

as the same would a pear on the line 4.--4 Figure 3 looking in t c direction of the arrows;

Figure 5 is a detail cross-section, in elevat1on, as the same would appear on the line 5-5 Figure 4;

-Fi re 6 is an elevation of one of the mova 1e shields or walls, part of the refractoiiy facin broken away, and

igure is a cross-section, as the same would appear on the line 77 Figure 6.

Like characters denote corresponding parts throughout the figures.

In the drawings, 1 designates an openhearth furnace of well known construction having the back-wall 2. This back-wall is faced by a series of sets of buck-stays. Each set of sta s comprise, preferably, three stays; the mid 1e one being an I beam 3 and the others channel beams 4. The channels of these beams face each other, and the channels of the I beam. The upper ends of the stays 3 and 4 are connected to longitudinally arranged channel-beams 5.

Before, or at the time of building the back wall 2 of the furnace a wall 6 is built up in front of each set of buck-stays 3, 4, and the back-wall 2 is off-set therearound, as at 7, see Figure 3, sothat the faceof the back-wall 2 is in the same vertical plane with the front face of the stays 3, 4, except where the same is offset as at 7. The wall 6 is made, preferably, of-refractory brick, the same as the bac -wall 2, and between each layer of brick in the wall 6 are laid the binding plates 8, of a suitable material, each of which have parts 9 complementary to the channels in the stays 3 and 4 and extending therebetween, see Figure 3. The front and sides of the wall 6 is referably faced with a facin 10 made of as estos or other heat insulatmg material to prevent fusing of the walls 2 and 6, as will be understood.

It is obvious, that when the back-wall 2 which is coincident with the wall 6 becomes deteriorated, or falls, that the wall 6 serves as the back-Wall to protect the heat, and may be used in lieu of the wall 2, until it is desirable or convenient to rebuild or replace the same. The wall 6 will out last the wall 2 and need not,.therefore, be replaced as often. I I

The movable shield or wall is designated 11, and its in Figures 6 and 7. I prefer to construct detailed construction is best seen with vertically vertically arranged s the shield with top and bottom and end flanges 12, 13 and 14-, 14, the last named being connected by the longitudlnally arranged spaced ribs 15 united wlth the rear Wall of said shield by the webs 16, and the rear 'wall is preferably provided with the plurality of openings 17 as a vent1lat1ng means to cool the wall 18 of refractory terial filling the pockets of the shield, formed by the ribs 15, webs 16 and rear wall of said shield. To the upper flange 12 are secured the eye-rings 19 to which are connected sections 20 of a chain 21 which rides over a pulley-wheel 22 and to the end of the chain 21 is secured a counter-balancing weight 22 to hold the shield in its difi'erent positions.

The shields 11 are independent of each other and may be lowered into position to protect a deteriorated portion of the back-wall 2, or to take the place of fallen part of said wall 2 to protect a heat, or a brick mason when repairin the wall 2. i

What claim is 1. in combination with an open hearth furnace having spaced sets of buck-stays, walls interlocked with said sets of buckstays, and shields movably supported be tween said sets of buck-stays.

2. ln combination with an open hearth furnace having spaced sets of buck-stays, walls of refractory material interlocked with said sets of buck-stays, shields movably supported between said sets of buck-stays, and a wall of refractory material interlocked in each of said shields and forming a facing therefor.

3. In an open hearth furnace, in combina-' tion, a back-wall of the furnace formed with vertically arranged spaced recesses, a group of buck-stays coincident with each recess, and a wall built up in front of each group of buck-stays" and disposed in said recesses.

4. In an open hearth furnace, in combination a back-wall of the furnace formed with paced recesses, a group of buck-stays coincident with each recess, a wall built up in front of each group of buck-stays and disposed in said recesses, and a facing for each of said last mentioned walls of heat insulating material.

5. In an open hearth, in combination, a back-wall of the furnace formed with vertically arranged spaced recesses, a group of buck-stays coincident with each recess, a wall built up in front of each group of buck-stays and disposed in said recesses, and a shield movably supported between each group of buck-stays.

6. In an open hearth furnace, in combination, a back-wall of the furnace formed arranged spaced recesses, a group of buck-stays coincident with each recess, a wall of refractory material built up in front of each group of buckstays and disposed in said recesses, and a shield movably supported between each group of buck-stays each shield having a facing of refractory material.

7. In combination with the buck-stays of an open hearth furnace, a wall forming a facing for said buck-stays between said buck-stays and the furnace wall, and means for binding said facing wall to said buck-stays.

8. In combination with the buck-stays" of an open hearth furnace, a wall of refractory material forming a'facing for said buck-stays between said buck-stays and the furnace wall, and means for binding said facing Wall to said buck-stays.

9. In combination with the buck-stays of an open hearth furnace, a wall of refractory material forming a facing for said buck-stays, a heat insulating material covering the exposed surfaces of said wall. and means for binding said wall to said buck-stays.

10. In combination with an open hearth furnace, a group of buck-stays having matching channels, a wall comprising layers of refractory brick, and plates between each layer of brick, each plate having a part complementary to the channels of said buckstays and forming a binder for said wall.

11. A shield for the purposes specified, said shield havingpockets formed by spaced flanges each having a locking element, and a facing for said shield made of refractory material and interlocked with said flanges and their locking elements and covering the latter.

12. In combination with an open hearth furnace having s aced sets of buck-stays, walls forming a fiicing coincident with each set of buck-stays, a shield movably supported between each set of buck-stays, and counterbalancing means for each shield.

13. In combination with an open hearth furnace having spaced sets of buck-stays, a wall section coincident with each set of buck-stays" and independent from the furnace wall. and means for interlocking said wall sections with their respective set of buck-stays.

14. In combination with an open hearth furnace having spaced sets of buck-stays, a wall section coincident with each set of buck-stays disposed between the buckstays and furnace wall and independent from the latter.

15. In combination with an open hearth furnace having spaced sets of buck-stays", a wall section coincident with each set of buck-stays disposed between the buckstays and furnace wall and independent from the latter, and a facing for said wall sections to prevent fusing of said wall sections with the furnace wall.

WILLIAM H. SOMMER. 

